G.A.Voropaiev, N.V.Rozumnyuk Flow control in the cavity with helping periodic blowing |
Applied hydromechanics, Vol. 12 (84) ¹ 3, (2010) |
| Numerical modeling is utilized to analyze a possibility to control the flow of viscous incompressible fluid over a plane cavity by means of periodic blowing at low rate through a part of the cavity bottom. The blowing with the frequency equal to the eigenfrequency of the flow over the cavity oscillations at the shear-layer regime leads to resonant amplification of the disturbance amplitude, increase periodic bursts of fluid from the cavity into the boundary layer and extends the affected zone downstream. Doubled frequency, on the contrary, essentially dumps the natural disturbances and suppresses the bursts from the cavity. Thus, the influence of the cavity onto the main flow parameters in much reduced. |
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KEY WORDS: viscous incompressible fluid, plane cavity, blowing, eigenfrequency |
| TEXT LANGUAGE: Russian |